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Battery Backup with UPS

Posted: Mon Dec 28, 2009 10:06 am
by oliverb
If you want to battery backup your weather station and Meteohub server and don't fancy building your own backup system as per my thread here http://www.meteohub.de/joomla/index.php ... 8&catid=22

Then you could use a UPS system. I have found this chap on ebay who sell reconditioned units with brand new batteries. http://stores.shop.ebay.co.uk/UPS-Trader__W0QQ_armrsZ1 .

I ordered a UPS700 from him for my master clock system as it needs 12v and 6v batt backup.It arrived next day.
All you do is plug your weather station and meteohub server into the mains plugs on the unit and on mains fail the unit converts the 24v standby battery back up to 240volts keeping your weather station running. The unit will auto shut down when the batteries are flat (unlike my design). There is also a plugin module £15 so you can check your UPS over the internet. There are more powerful units from the same manufacturer if required.

You could also plug your internet router into the UPS if you want to keep your server "live" on the net during blackouts.

The only drawback is my UPS uses around 21watts of power so with your server and weather station plugged in you are looking at approx 30 watts total. My DIY batt backup uses around 12 watts all in. Image

Full details on the APC UPS700 can be found here
http://www.apcc.com/resource/include/te ... u=SU700net

Re:Battery Backup with UPS

Posted: Mon Dec 28, 2009 7:53 pm
by skyewright
oliverb wrote:The only drawback is my UPS uses around 21watts of power
That matches my experience with a similar size SmartUPS.

The lower spec (i.e. 'stand by/switch in' rather than 'on-line' ) Back-UPS series have a lower overhead.

IIRC my Back-UPS 650 uses about 8W with nothing else plugged in. With the equipment I am running the switch over time for the Back-UPS device does not seem to cause any problem (it did with the original ALIX-1D PSU, but replacing that very basic PSU with a small power brick solved that problem).